APA (7th ed.) Citation

Christensen, P. R. The many faces of Mars. [article]. 1 p.22-29 Jul 2005.

Chicago Style (17th ed.) Citation

Christensen, Philip R. The Many Faces of Mars. [article]. v.293: 1 p.22-29 Jul 2005.

MLA (9th ed.) Citation

Christensen, Philip R. The Many Faces of Mars. [article]. 1 p.22-29 Jul 2005.